No seriously, I do.
It's a blue aventurine crystal that is an Aries stone (I'm an Aries). It is a small, lovely, blue stone with soft smooth rounded edges. The best place to carry it is close to your heart - thus the whole bra-stuffing. It is supposed to help me through what is going on in my life right now.
Honestly? I think it's a bit weird, and after my mum and I had left the store I said "You know who I've turned into? Mrs R!" referring to the mother of a close friend who went through a phase with crystals and such and we all thought (with much respect) that she was one sandwich short of a picnic when she did all this stuff 20 years ago.
Hmmm. Don't you just love it when you think you know about something and it comes back to bite you in the ass?
Sorry Mrs. R.